A kind of tc4 titanium alloy solid welding wire for laser wire filling welding with large thickness and ultra-narrow gap and preparation method thereof

Abstract

A TC4 titanium alloy solid welding wire for laser wire filler welding with large thickness and ultra-narrow gap and a preparation method thereof. The invention belongs to the technical field of welding materials. The invention provides a TC4 titanium alloy solid welding wire for laser wire filling welding with large thickness and ultra-narrow gap and a preparation method thereof. The chemical composition and mass percentage of solid welding wire are Al: 5.0%-7.0%, V: 4.0%-6.0%, Mo: 1.5%-2.5%, Cr: 0.2%-0.5%, Zr: 0.5%-1.5% , and the remainder is Ti. Method: Weigh the raw materials according to the chemical composition of the welding wire, mix them, press them into electrode blocks, weld them into consumable electrodes, first melt them once to get an ingot, and then melt them twice to get titanium alloy ingots-car skins and cut them off Riser, forged into billet - rolled, drawn, straightened, ground to obtain wire - vacuum annealed - drawn and reduced, stress relieved in a vacuum tube annealing furnace - cleaned, wound onto a wire spool , Vacuum plastic packaging, to obtain TC4 titanium alloy solid wire for laser wire filling welding with large thickness and ultra-narrow gap.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a TC4 titanium alloy solid welding wire for laser wire-filled welding with large thickness and ultra-narrow gap and a preparation method thereof. Background technique [0002] TC4 titanium alloy is widely used in marine drilling, pressure vessels, deep submersibles, Nuclear submarines, aerospace ships and weapons and equipment and other fields. As early as the 1980s, the U.S. coastal defense construction army had already begun to use titanium alloy materials to manufacture ocean-going transport ships, which greatly improved its service life and stability, and reduced maintenance costs. In recent years, the proportion of titanium alloy materials used in the manufacturing of deep sea space workstations in many western developed countries has been increasing. Compared with the overall stamping forming, the welding preparation process is small, the cycle is sh...

AI Technical Summary

Problems solved by technology

Laser wire-filled welding has the advantages of narrow welding heat-affected zone and concentrated welding energy of laser welding, and at the same time, due to the metallurgical effect of filler metal, it can supplement the metallurgical burning loss of beneficial elements, which can refine the structure and grain, improve Comprehensive performance plays an important role. Based on the characteristics and advantages of laser filler wire welding, the existing welding wire cannot fully meet its use requirements, so a new welding wire with high welding efficiency, good molten pool flow and spreadability, less spatter in the welding process, and There is no oxide and welding fume adhesion on the surface of the welding seam, and it is suitable for large thickness ultra-narrow gap laser wire filler welding. Solid welding wire is very important for improving the application range of large thickness titanium alloys.

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